Improve Host Management

[MalteJ]

Summary

This work item focuses on improving the core host management capabilities of FeOS.

Key deliverables include integrating a time synchronization client (SNTP/NTP) to ensure system clock accuracy and extending the Host API to expose critical resource statistics (memory and CPU) for better observability.

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Scope

✅ In Scope

• Integrate an SNTP/NTP client for system time synchronization
• Extend the Host API to expose host memory and CPU consumption statistics

❌ Out of Scope

• Detailed per-container resource monitoring (this is focused on host statistics)
• Integration with external monitoring systems (e.g., Prometheus exporters)
• Advanced time synchronization features (e.g., PTP)

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Responsible Areas

• FeOS Runtime

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Contributors

• @guvenc 
• @MalteJ 

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Acceptance Criteria

• System Services

  - [ ] An SNTP or NTP client is integrated and can be enabled via configuration.
  - [ ] FeOS system time is successfully synchronized with a configured time server upon startup and periodically.

• Host API & Observability

  - [ ] A new Host API endpoint exists for retrieving host resource statistics.
  - [ ] The API endpoint returns current host-level memory usage (e.g., total, used, free).
  - [ ] The API endpoint returns current host-level CPU utilization (e.g., load average or percentage).

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Action Items

• Research and integrate a lightweight SNTP/NTP client library.
• Add configuration options for enabling NTP and setting time servers.
• Design the Host API endpoint and data structure for resource statistics.
• Implement the backend logic to gather host memory and CPU data.
• Expose collected memory/CPU data via the new Host API endpoint.
• Add unit and integration tests for NTP and the statistics API.